9:^0 



SCIENCE. 



[X. S. Vol. XXI. Xo. 540. 



only in caustic alkalies and strong mineral 

 acids. From sodium hydrate it crystallizes 

 as a di-sodium salt in beautiful yellow needles 

 with green fluorescence. On the other hand, 

 a sulphuric acid salt can be obtained in color- 

 less rhombohedra by diluting the sulphuric 

 acid solution with water. 



Synthesis of Quinazolines from 6 Nitro-acet- 

 anihranil: H. A. Seil and M. T. Bogert. 

 The 6 nitro-acet-anthranil was prepared by 

 the action of acetic anhydride on acetanthra- 

 nilic acid. It is much more reactive than 

 the acetanthranil. It combines at once with 

 primary amines forming first, the acid amide 

 by direct addition, and then by loss of water 

 passing over to the quinazolines. 



NO. 



NO, 



O 



CONHR 



f " +NH,R 

 — NCOCH3 \yNHCOCH3 



O 



II 



/y'^^N-R 



The 6 nitro-acetanthranil is treated with an 

 excess of the amine in a water solution of 

 1 to 3. It is brought to boiling and the ex- 

 cess of amine is distilled off. The solution 

 is then made acid with acetic acid and filtered. 

 The quinazoline thus obtained is purified by 

 crystallization from alcohol. 



The derivatives prepared are the methyl, 

 ethyl, normal propyl, iso propyl, secondary 

 butyl, iso butyl, iso amyl and allyl substitu- 

 tions of the (2)methyl (5)nitro- (4)ketodihy- 

 droquinazoline. These are all white crystal- 

 line solids of high melting points; soluble in 

 hot alcohol, slightly soluble in cold; soluble 

 in dilute acetic acid (from which they can 

 not be crystallized) and practically insoluble 

 in water. 



Influence of Organic Acids on the Precipita- 

 tion of Antimony Sulphide: A. II. Peter- 

 son. 



In the presence of a slight excess of mineral 

 acids, relatively large quantities of certain 

 organic acids prevent the complete precipita- 



tion of antimony sulphide by sulphuretted 

 hydrogen. The influence was studied quan- 

 titatively and it was found that the influence 

 was not directly proportionate to the masses 

 of acid present, a limit being reached in each 

 case, although the ratio of acid to the anti- 

 mony present was inordinately large. The 

 maximum effect obtained was for citric acid, 

 which retains, in solution, seventy per cent, 

 of the antimony present. 



Of the acids studied, ethyl tartaric came 

 next, then malic, while tartaric was the least 

 energetic. The effect seemed confined to the 

 oxy-acids, because succinic acid is without any 

 effect and the influence of the citric acid is 

 entirely lost when its hydroxyl group has been 

 acetylated. 



The Crystallization of Sodium Iodide from 



Alcohols: Morris Loeb. 



It was accidentally observed that sodium 

 iodide is extremely soluble in methyl alcohol 

 and was not precipitated, even on the addi- 

 tion of considerable volumes of anhydrous 

 ethyl ether. The alcohol solution, on cooling 

 to room temperature, separates out crystals iu 

 long shining plates. Below 0° a voluminous 

 mass of fine needles separates out, which are 

 identical in composition, but different in ap- 

 pearance from those just mentioned. Melting 

 point, 22 to 23°. Formula, XaI.3CH,0. 

 Under similar circumstances, ethyl alcohol 

 dissolves the salt and crystallizes with it in 

 proportion, IvaLCJI^O, while propyl alcohol 

 yields 5N'aI.3C3H,b. F. H. Pough, 



Secretary. 



the torrey botanical club. 



A MEETING of the club was held at the mu- 

 seum of the New York Botanical Garden on 

 Wednesday afternoon, April 26, 1905, with 

 seventeen persons present and President Rusby 

 ill the chair. 



The announced paper by Dr. P. A. Eyd- 

 berg on ' The Composition of the Kocky 

 Mountain Flora ' was omitted by reason of 

 the absence of the author. 



' Notes on the Wire-Grass Country of 

 Georgia ' was the title of the paper presented 

 by ]\Ir. R. 11. Harper. 



